Knockback Delay

Percent of hits it delays.

Ticks it holds everything back after you're hit (random in this range).

Only while you face a player within 6 blocks (whoever likely hit you).

Not in water, lava or cobwebs.

While it holds, let through what doesn't concern you (others moving, block changes, sounds, chat), so the world doesn't freeze.

Only delay knockback you take in the air.

A delay that began in the air ends early the moment you land.

A second knockback while one waits lets everything go first, instead of holding both.